--- product_id: 371552959 title: "Blue Marble National Geographic Professional Rock Tumbler Kit - Complete With Durable Tumbler, Rocks, Grit, And Patented Gemfoam Finishing Foam Polish, Educational Stem Science" brand: "blue marble" price: "€ 306.53" currency: EUR in_stock: true category: "Blue Marble" url: https://www.desertcart.hr/products/371552959-blue-marble-national-geographic-professional-rock-tumbler-kit-complete-durable store_origin: HR region: Croatia --- # GemFoam polish for dazzling shine 75% quieter operation for peaceful focus Auto shutoff timer for perfect precision Blue Marble National Geographic Professional Rock Tumbler Kit - Complete With Durable Tumbler, Rocks, Grit, And Patented Gemfoam Finishing Foam Polish, Educational Stem Science **Brand:** blue marble **Price:** € 306.53 **Availability:** ✅ In Stock ## Summary > 💎 Rock your world with precision, polish, and peace! ## Quick Answers - **What is this?** Blue Marble National Geographic Professional Rock Tumbler Kit - Complete With Durable Tumbler, Rocks, Grit, And Patented Gemfoam Finishing Foam Polish, Educational Stem Science by blue marble - **How much does it cost?** € 306.53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/371552959-blue-marble-national-geographic-professional-rock-tumbler-kit-complete-durable) ## Best For - blue marble enthusiasts ## Why This Product - Trusted blue marble brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Create & Wear Your Art:** Includes necklace, keychain, ring, and clip-on earring fastenings to turn your polished gems into stylish jewelry. - • **Whisper-Quiet Operation:** Experience 75% less noise than typical plastic barrels—perfect for home or office creativity. - • **Precision-Timed Tumbling:** Set your speed and tumbling time with an automatic shutoff for flawless results every time. - • **Innovative GemFoam Polish:** Add a patented finishing foam that delivers a brilliant, reusable shine to your stones. - • **All-Inclusive Gemstone Kit:** 453g of nine unique global gemstones plus four grit levels to master every polishing stage. ## Overview The National Geographic Professional Rock Tumbler Kit is a premium, all-in-one gemstone polishing system featuring a durable, leak-proof barrel, a quiet motor, and an automatic shutoff timer. It includes 453g of diverse rough stones, four grit stages, and patented GemFoam polish for a brilliant finish. Designed for educational STEM exploration, it also comes with jewelry fastenings to transform your polished gems into wearable art. ## Description Take your rock tumbling seriously with this top-of-the-line professional rock tumbler from National Geographic! This kit has all the features and accessories you’ll need to master rock tumbling, start an extraordinary rock collection, and create beautiful jewellery. Contents and Features: Power-saving automatic shutoff timer; reliable, long-lasting motor; leak-proof tumbler barrel; noise-reduced operation (75% quieter than plastic barrels); plenty of stones (453g) and four levels of grit; jewellery fastenings so you can create your own unique jewellery; GemFoam, the most innovative way to add dazzling shine to your polished stones! This high-quality tumbler allows you to set your speed and tumbling time. When the time expires, your tumbler will automatically shut-off, allowing you to choose the perfect amount of tumble time for each grit stage. Plus, our redesigned tumbling barrel dampens sound better than most tumblers out there. The rough rocks provided (453g) contain nine different gemstones from around the world, and our tumbling grit is labeled by tumbling stage to make the process even easier! Choose your favorite gems and turn them into jewellery with the included necklace, key chain, ring, and two clip-on earring fastenings inside. And don't forget about GemFoam, our exclusive new way to add dazzling shine to your polished rocks! Use GemFoam just like tumbling grit, simply add it to the barrel with your stones and water, then three days later marvel at the shine! GemFoam is reusable too, allowing you to create a truly impressive gemstone collection! National Geographic Toys makes the highest quality hands-on science toys, and all products are backed by exceptional service. The National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations. ## Features - manufacturer: NATIONAL GEOGRAPHIC - Item Trademark: NATIONAL GEOGRAPHIC - Item Category: Toys And Games ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B086Z83SV5 | | Age Range Description | Kid | | Battery Description | No batteries required | | Best Sellers Rank | #87,427 in Kitchen ( See Top 100 in Kitchen ) #1,232 in Tumblers & Water Glasses | | Brand Name | Blue Marble | | Customer Reviews | 4.4 4.4 out of 5 stars (4,209) | | Educational Objective | Geological exploration, observation skills, logical thinking | | Included Components | Everything you need to rock rocks like a pro. | | Is Assembly Required | No | | Item Dimensions | 32 x 17 x 26 centimeters | | Language | English | | Manufacturer | National Geographic | | Manufacturer Maximum Age (MONTHS) | 120 | | Manufacturer Part Number | NGPROTUMBLER3 | | Material Type | Multiple | | Model Number | NGPROTUMBLER3 | | Set Name | Gemstone Set | | Size | M, S | | Sub Brand | National Geographic | | Theme | Science | | UPC | 816448029288 | | Unit Count | 1.0 Count | ## Product Details - **Age range (description):** Kid - **Brand:** Blue Marble - **Item dimensions L x W x H:** 32 x 17 x 26 centimeters - **Size:** M, S - **Theme:** Science ## Images ![Blue Marble National Geographic Professional Rock Tumbler Kit - Complete With Durable Tumbler, Rocks, Grit, And Patented Gemfoam Finishing Foam Polish, Educational Stem Science - Image 1](https://m.media-amazon.com/images/I/91NIcMq15dL.jpg) ## Frequently Bought Together - NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit - Complete Rock Tumbler for Adults & Kids with Durable 2 Lb. Barrel, Rocks, Grit, and Patented GemFoam Finishing Foam Polish, Rock Polisher - Blue Marble National Geographic Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with Any Rock Polisher, Rock Tumbler Supplies - NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1Lb. Gemstones and Rocks for Tumbling including Unpolished Amethyst and Quartz – Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/371552959-blue-marble-national-geographic-professional-rock-tumbler-kit-complete-durable](https://www.desertcart.hr/products/371552959-blue-marble-national-geographic-professional-rock-tumbler-kit-complete-durable) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-19*